Having your estimates of the coil resistances was helpful.
Bill finished up the measurements and I have attached a figure which
has the measurements on the circuit diagram that we had
( the diagram that you sent was not correct). Bill disconnected the
heater switch by taking out the woodsmetal from J0 and he also disconnected the diodes. 
He then put a source of 0.63mA through the circuit as indicated in the figure. 
In the figure ( above the 5d , 5c etc) are the voltages relative to the red lead and below are the
differential voltage and calculated resistance. For the one side
of the magnet ( coils 1,7,8a,8b,9a,9b,10a,10b,10c,10d) the resistances
agree fairly well with your estimates. The strange part is at J1 we
measure a resistance drop which one expects if adding 5c+5b+5a+4b
but we don't see voltages drops across the individual J2 through J5.
One note is that we measured 0.011 voltage across 4b but wrote 0 Ohms.
Talking about it more we believe the voltage measurement and think that
there is 18 Ohms there. Also we have marked on the figure where we
found the bad diode ( we found it broken when we opened the top off the donut). 
Bill also measured the junction points relative to ground which
is the list of voltages on the right side of the figure.
    When the magnet was cold before we warmed it up measurements were 
 made across the taps at seal "D". The voltages measured
at 0.55A were:
V_AB +1.465
V_BC +0.536
V_CD -0.165
V_DE +0.165
V_EF  0.0
V_HJ  0.0
V_JK  0.0
V_CE  0.0
V_AC  2.0
V_BK  0.536
V_AK  2.0